The jar test is used to determine the proper chemical dosage required for good coagulation and flocculation of water. The test is commonly used in potable water, secondary effluent prior to advanced wastewater treatment, secondary clarifier influent, and sludge conditioning practice. Designed for individuals who have completed National Pollutant…

This module describes the process used to determine solids mass and location throughout a waste water treatment plant, explains how these values are used to determine the solids mass balance around single treatment units and the entire system, and presents calculations of solids in pounds and sludge units. The instructor's manual contains a…

Designed for individuals who have completed National Pollutant Discharge Elimination System (NPDES) level 1 laboratory training skills, this module on digestor gas analysis provides waste water treatment plant operators with the basic skills and information needed to: (1) successfully run the carbon dioxide analysis test; (2) accurately record…

A brief overview of the basic concepts and philosophies for sampling water and waste water systems is presented in this module. The module is not intended to specify sampling procedures, frequencies, or locations for specific treatment facilities but rather to outline those general procedures which should be followed when sampling under most…

Designed for individuals who have completed National Pollutant Discharge Elimination System (NPDES) level 1 laboratory training skills, this module provides waste water treatment plant operators with the basic skills and information needed to: (1) standardize a nephelometric turbidimeter; (2) determine the turbidity of a sample; and (3) calculate…

Designed for use in Trident Technical College's Secretarial Science Instructional Lab, this learning module provides self-instructional lessons and self-tests to teach students to operate the IBM Mag Card II Typewriter. Each module focuses on one or more features of the machine, providing learning objectives, illustrations, detailed explanations…

These guidelines are intended to assist high school psychology teachers in safeguarding the rights and welfare of students and experimental subjects while promoting high-quality instruction. There are three sets of guidelines. The first set deals with the use of animals in school science behavior projects. The major goal of such projects should be…

A learning center is a designated area of the classroom where resources are provided to guide individuals and groups of children in specific activities. The rationale, suggestions for themes, and design and construction of the learning center are examined. (Author/DE)

This article describes a course in circuit design that required students to design input-output devices for a PDP-8/L computer that would become a permanent part of the system. (HMD)

Several short articles describe programs utilizing laser/electro-optics technology curriculum materials developed by Technical Education Research Centers (TERC): at undergraduate and graduate levels in universities; in a city college; in continuing education; and in industry. Modules, independent units based on booklets or films, include…

Focusing on the professional aspects of teaching, student-centered instruction, problem solving, and laboratory techniques are suggested as teaching aids for the vocational agriculture teacher. (MW)

Twelve science activities involving the common paper food bag and the small plastic food bag are described. (DT)