Four resource units are included in this document. For each, general objectives on knowledge and concepts, skills, and attitudes are given; content is outlined; and some suggestions for initiating the unit are listed. The first unit, on measuring length, provides six lesson plans, to teach about the meter, the smaller units of the meter, units larger than the meter, and converting within the metric system. Over 25 activity worksheets follow; each uses both English and Spanish (on reverse sides). The second unit focuses on measuring weight/mass, with three lesson plans on the gram, smaller and larger measures, and converting. Over 20 activity worksheets in English and Spanish follow. The focus of the third unit is on measuring capacity/volume, with three lesson plans on liters, smaller and larger measures, and converting. About 20 activity worksheets follow. In the fourth unit, the focus is on temperature, with four lesson plans on developing the concept of temperature, learning about thermometers, learning to read a Celsius scale, and relating estimates with measures. About 15 activity worksheets are included. (MNS)