The document describes two online performance-based assessment instruments that can be used to assess vocabulary and grammar. The first instrument assesses vocabulary, specifically the use of make and do collocations. It contains 20 multiple choice questions and provides feedback on correct and incorrect answers in the form of percentages. The second instrument assesses grammar through prepositions within sentence contexts. Learners must fill in missing prepositions or can choose from alternatives. It contains 14 sentences and also assesses vocabulary. It gamifies the assessment by awarding points for correct answers. Feedback includes quiz scores, numbers of correct and incorrect answers, points earned, and time taken.