Many classroom tests come from textbooks. Math textbooks provide many tests, as do some basal reading series. Some of the best assessments are the simplest. For example, a teacher's dictating a paragraph, where the students are required to write down what is dictated, is very simple but very effective. Finding a paragraph to dictate is no problem, and student shortcomings in spelling, punctuation, capitalization, and handwriting are immediately apparent to the teacher.
Excellent resources are now available for finding tests.
Buros Mental Measurements Yearbook and Buros Tests in Print have for many years been an excellent resource, and now, in addition, there is the Internet. Citations to reviews in Buros and in Pro-Ed Publishers' Test Critiques are provided for many, but not all, tests. The 3-R's Test. It consists of an elementary form with six items and a secondary form with six items. The test provides scores for capitalization, punctuation, grammar, and syntax.