Comparison of the effects of inquiry-based cooperative learning and demonstrations in science education

The reported research project involved studying how teaching science using demonstrations, inquiry-based cooperative learning groups, or a combination of the two methods affected sixth grade students’ understanding of air pressure and density. Three different groups of students were each taught the two units using different teaching methods. Group one learned about the topics through both demonstrations and inquirybased cooperative learning, whereas group two only viewed demonstrations, and group three only participated in inquiry-based learning in cooperative learning groups. The study was designed to answer the following two questions: 1. Which teaching strategy works best for supporting student understanding of air pressure and density: demonstrations, inquirybased labs in cooperative learning groups, or a combination of the two? 2. And what effect does the time spent engaging in a particular learning experience (demonstrations or labs) have on student learning? Overall, the data did not provide sufficient evidence that one method of learning was more effective than the others. The results also suggested that spending more time on a unit does not necessarily equate to a better understanding of the concepts by the students. Implications for science instruction are discussed.

Rotational Grazing Demonstrations with Beef Cows on CRP Land in Adams County, 2001

Two rotational-grazing systems, a 13-paddock and a 4-paddock, have been demonstrated on CRP land near Corning, Iowa since 1991 and this report summarizes the 2001 production data. Establishment of this project was to show economically feasible grass alternatives to row crops and CRP for steeply sloping (9% - 14% slope), highly-erodible land (HEL). Stocking rates were 1.57 and 1.72 acres per pair on the 13- and 4-paddock systems, respectively. In a 119 day grazing season calves gained 2.23 and 2.27 lbs/day for the 13- and 4-paddock systems, while cows gained 51.4 and 113.4 lbs, respectively. While some system hay growth was utilized to stave off drought conditions, there was a net hay gain of 11 and 5.5 bales of hay for the 13- and 4-paddock systems, respectively

Rotation Grazing Demonstrations With Beef Cows on HEL - Adams County Conservation Reserve Program (CRP) Project

Two grazing systems were demonstrated on Conservation Reserve Program (CRP) land in southwestern Iowa near Corning in the summers of 1991, 1992, 1993, 1994, and 1995. This report summarizes the 1995 data and compares them to results from the four previous years. The systems, a 13-paddock intensive-rotational grazing system and a 4-paddock more traditional rotation, both established in 1991, are aimed at showing economically sustainable grass alternatives for steeply sloping (9-14% slope), highly erodible land (HEL) once the 10-year CRP ends. In a 147-day grazing season in 1995, nursing crossbred calves with no creep gained 2.36 pounds and 2.38 pounds per day on the 13- and 4-paddock systems, respectively. The rotations were stocked at 1.65 acres per cow-calf pair on the 13-paddock system and 1.72 acres per pair on the 4-paddock system. This produced 210.2 pounds of calf gain per acre on the 13-paddock system and 203.2 pounds of calf gain per acre on the 4- paddock system.. Similar calves gained 2.37 pounds and 2.50 pounds per day for 155 days, yielding a total gain per acre of 222.7 pounds on the 13-paddock system and 224.9 pounds on the 4-paddock system in 1994. Results for 1992 remain the highest from both systems in the five years of grazing, with calf gain per head per day at 2.45 for 155 days netting 241.9 pounds per acre on the 13- paddock system and calf gain per head per day at 2.38 for 154 days on the 4-paddock system yielding 263.6 pounds per acre. Cows maintained both their weight and condition scores in both systems again in 1995. A third system, the 18-paddock intensive-rotational grazing system, was stocked with stocker steers in 1995, and the results are reported in a second article in the 1996 ISU Beef Research Report entitled “Intensive- Rotational Grazing Steers on Highly Erodible Land at the Adams County CRP Project.” Concerning grazing management, paddocks were grazed four, five, or six times in the 13-paddock intensive- rotational grazing system during the 147-day grazing season of 1995. This number of times grazed per paddock was nearly equal to times grazed per paddock in 1994. However, several paddocks were subdivided temporarily to equalize paddock size and increase grazing uniformity. This increased the total number of cattle moves in the 13-paddock system from 78 in 1994 to 109 in 1995. The average length of stay on each paddock or subdivision of a paddock per grazing time was 1 to 2.2 days. This was less than in any of the other four grazing years in this project. The principle of not grazing more than half the standing forage during any one grazing period was closely followed in 1995. All paddocks in the 13-paddock system were also rested approximately the recommended 30 days between each grazing cycle in 1995.

Suggested demonstrations using dried whole egg in family meals.

Mode of access: Internet.

Rural transportation projects on Indian reservations : a report on 11 demonstrations : final report /

Mode of access: Internet.

Service and Methods Demonstrations Program report /

Documentation of the activities and accomplishments of the Service and Methods Demonstration Program for fiscal years 1979, 1980, and 1981.

A system of astronomy. Containing the investigation and demonstrations of the elements of that science.

Preface signed: W. Emerson.

Elementary and practical arithmetic on the inductive system, by analysis and synthesis : containing lucid demonstrations of the rules, arithmetical improvements, and curiosities, mensuration of planes and solids, philosophical problems ... /

Mode of access: Internet.

Flora Parisiensis : ou, descriptions et figures des plantes qui croissent aux environs de Paris; avec les différens noms, classes, ordres et genres qui leur conviennent, rangés suivant la méthode sexuelle de M. Linné, leurs parties caractéristiques, parts, propriétés, vertus et doses d'usage en médecine, suivant les demonstrations de botanique qui se font au Jardin du roy /

Includes indexes.

Chess rendered familiar by tabular demonstrations of the various positions and movements,

Mode of access: Internet.

The elements of Euclid : viz, the first six books, together with the eleventh and twelfth. The errors, by which Theon, or others, have long ago vitiated these books, are corrected : and some of Euclid's demonstrations restored : also the book of Euclid's Data, in like manner corrected /

Mode of access: Internet.

An introduction to natural philosophy; or, Philosophical lectures read in the University of Oxford anno Dom. 1700. To which are added the demonstrations of Monsieur Huygens's theorems, concerning the centrifugal force and circular motion,

Mode of access: Internet.

The elements of Euclid : viz the first six books, together with the eleventh and twelfth, the errors by which Theon or others have long ago vitiated these books, are corrected, and some of Euclid's demonstrations are restored : also the book of Euclid's Data, in like manner corrected /

To this 10th ed. are also annexed, Elements of plain and spherical trigonometry.

General theory of bridge construction: containing demonstrations of the principles of the art and their application to practice ... With practical illustrations.

Mode of access: Internet.