MTLE Chemistry (Grades 9-12) case studies
MTLE Chemistry (Grades 9-12) · Put your knowledge to work in context.
The MTLE Chemistry (Grades 9–12) is one of the subject-matter tests listed in the Minnesota Teacher Licensure Examinations (MTLE) program, a set of exams used in Minnesota's teacher licensure process. It appears on the official MTLE test list alongside other secondary science licenses such as Earth and Space Science (Grades 9–12), Life Science (Grades 9–12), and Physics (Grades 9–12), and alongside the Middle Level Science (Grades 5–8) test. Candidates typically take it to demonstrate chemistry content knowledge for a grades 9–12 chemistry license; the official site directs prospective candidates to confirm which tests they need through its "What tests do I need to take?" guidance rather than assuming a single test suffices. The published source does not enumerate the exam's domains, item count, time limit, fee, or passing score, so treat any such figures you encounter elsewhere with caution and verify them on the official MTLE site. The MTLE Chemistry (Grades 9-12) case studies are 5 cases and about 3,391 words.
1Acid Dilution Spill and Mixed Waste at Station 4
On a Thursday afternoon, Mr. Alvarez's second-period Chemistry II class of 28 students is preparing 250 mL of approximately 3.0 M hydrochloric acid from 12.1 M stock for tomorrow's reaction-rate lab.
708 words, about 4 min2Exit-Ticket Data Reveal Persistent Particle Misconceptions
After a three-week unit on the particulate nature of matter, Ms. Chen gives her 26 general chemistry students a three-item exit ticket.
697 words, about 3 min3Rate Investigation with Confounded Variables
Okafor's students are investigating how concentration affects the rate of reaction between marble chips (calcium carbonate) and hydrochloric acid. Each group receives 1.0 g of chips and 25 mL of acid.
675 words, about 3 min4Mole Conversions in a Heterogeneous Class
Rivera teaches a heterogeneous 10th-grade chemistry class of 30. The lesson is mole-to-mass conversions using the periodic table.
654 words, about 3 min5Overshot Endpoint and an Outlier in a Titration
In an honors chemistry lab, students standardize a sodium hydroxide solution using potassium hydrogen phthalate (KHP) and then use it to determine the molarity of an unknown hydrochloric acid solution. Each student massed about 0.500 g of KHP and titrated to a phenolphthalein endpoint.
657 words, about 3 min