The document discusses different types of assessment used to evaluate student learning in science classrooms. It defines assessment as gathering information about student learning to inform decisions, while evaluation focuses more broadly on overall experiences. There are three main types of assessment: diagnostic to establish baseline knowledge; formative to collect data during lessons; and summative to make judgements after instruction. Both traditional tests and alternative approaches like portfolios, journals and performances are described. The goals of assessment are to improve instruction, plan curricula and develop self-directed learners.