Biology Upper Secondary Teacher Guide - Department of Education

BiologyUse dichotomouskeys to classifyunknown organismsDivide students into groups. Allocate 3–4 unnamed pictures orspecimens of organisms. Use simple dichotomous keys developedby teacher to identify kingdom, phylum and class. Students can alsoresearch order, family, genus and species for each organismSuggested assessment taskAn experiment on preparing wet mounts of cheek and onion cells andobserve under the microscope.20 marksAssessment criteriaStudents will be assessed on the extent to which they can:• prepare wet mounts (cheek and onion cells)• manipulate the microscope• calculate magnifications and size of specimens• observe and present• produce a written laboratory report (introduction, aim, material, method,result, discussion and conclusion).Marking guide11.1: Undertake experiment on wet mounts and present laboratoryreport20 marksPerformanceCriteriaVery HighAchievement(18–20 marks)HighAchievement(14–17marks)SatisfactoryAchievement(10–13 marks)Low Achievement(0–9 marks)Appropriate title(2 marks)Suitable aim(2 marks)Correctly andclearly state therequired title (2)Aims clearly andcorrectly written(2)Clearly state the title (1-2) Inappropriate title (0-1)Aims clearly stated (1-2) Irrelevant aims (0-1)Logicalprocedures(6 marks)Correctproceduresfollowed andequipment used(6)Proceduresfollowed andappropriateequipment used(4-6)Procedures andthe use ofequipmentreasonablyfollowed (1-4)Inconsistentprocedures and useof equipment (0-1)Detailedanalysis andexplanation(6 marks)Scientific analysiswith detailedexplanation andlogicalpresentation (6)Good analysisand explanation(5)Fair analysis andexplanation(3-4)Poor analysis withminimum explanation(0-2)Appropriateconclusion(4 marks)Scientific andreliable conclusion(4)Reliable and wellwrittenconclusion (3)Conclusionappropriate (2)InappropriateconclusionLacks scientificunderstanding (0-1)26