**Lucas Atoms.**Discrete Math Day, November 16, 2019.**Counting with Fibonacci numbers: Fibotorials, Fibonomials, and other Fibothings.**Dickinson College Seminar, October 29, 2019.**Hopping from Chebyshev polynomials to permutation statistics.**Permutation Patterns, Universität Zürich (UZH), Switzerland, June 27, 2019.**Skew semi-standard Young tableaux with at most three rows.**UMass Amherst Discrete Math Seminar, May 2, 2019.**Lucas analogues of combinatorial formulas.**WPI Discrete Math Seminar, March 12, 2019.**The Collaboratory: An Undergraduate Introduction to Research.**MAA Session on Integrating Research into the Undergraduate Classroom, Joint Math Meetings, January 16, 2019.**Writing and revising to conquer proofs in discrete mathematics.**Session on Best Practices and Innovation in the Teaching of Discrete Mathematics, MathFest August 3, 2018.**A sequence that counts: the Catalan numbers.**Mathematical Adventures and Diversions (MAAD) Seminar, Lafayette College, February 12, 2018.**The Robinson-Schensted-Knuth correspondence.**Special Seminar, Northwestern University, January 31, 2018 (slides).**Combinatorics of orthogonal polynomials and skew tableaux.**AMS Contributed Paper Session on Partitions, Paths, and Permutations, Joint Mathematics Meetings, January 12, 2018 (abstract).**Probability puzzles.**MathPath Plenary, July 22, 2017.**From Dyck paths to standard Young tableaux.**Brandeis Combinatorics Seminar, March 17, 2017.**Catalan numbers and generating functions.**Center for Women in Mathematics, Smith College, February 16, 2017.**Combinatorics of orthogonal polynomials and enumeration of Young yableaux.**Alg/Comb/Geom Seminar, Smith College, October 25, 2016.**Orthogonal polynomials, lattice paths, and skew Young tableaux.**PhD Defense, July 14, 2016.**Skew Young tableaux with at most three rows, Chebyshev polynomials, and Motzkin paths.**Dartmouth Combinatorics Seminar, April 14, 2016.**Skew Young tableaux with at most three rows, Chebyshev polynomials, and Motzkin paths.**MIT Combinatorics Seminar, April 6, 2016.**Skew Young tableaux with at most three rows with Chebyshev polynomials and Motzkin paths.**Graduate Student Combinatorics Conference, Clemson University, April 1-3, 2016.**Orthogonal polynomials and skew standard Young tableaux with at most three rows.**Brandeis Combinatorics Seminar, January 19, 2016.**Robinson-Schensted for lattice paths.**Penn State Altoona Colloquium, November 24, 2015.**Chain decompositions of LYM posets.**Brandeis Combinatorics Seminar, November 3, 2015.**Orthogonal polynomials and Motzkin paths with peak and flat restrictions.**8th International Conference on Lattice Path Combinatorics & Applications, August 17-20, 2015. (announcement)**Counting flawed Motzkin paths by Motzkin numbers.**Graduate Student Combinatorics Conference, March 27-29, 2015. (announcement)**Counting flawed Motzkin paths by Motzkin paths.**Combinatorics Seminar, Brandeis University, February 24, 2015.**The Robinson-Schensted correspondence.**Graduate Student Seminar, Brandeis University, January 30, 2015.**Enumerative combinatorics – multivariate power series.**Jsoftware Conference, July 24-25 2014.**Counting non-crossing trees by descents.**Combinatorics Seminar, Brandeis University, March 31, 2014.**Automaticity of the braid group.**Graduate Student Seminar, Brandeis University, March 13, 2014.**Counting binary trees and hyperplane arrangements.**Combinatorics Seminar, Brandeis University, October 24, 2013.**Percolation.**Graduate Student Seminar, Brandeis University, February 17, 2011.